Home
Class 12
PHYSICS
The strength of the magnetic field in a ...

The strength of the magnetic field in a long solenoid having 5000 turns per meter is `3.14x 10^(-2)T`. The current flowing through the solenoid is

A

`2 A`

B

`3 A`

C

`4 A`

D

`5 A`

Text Solution

Verified by Experts

The correct Answer is:
D
`B=mu_0nI therefore I=B/(mu_0n) therefore I=(3.14 xx 10^(-2))/(4pi xx 10^(-7)xx 5 xx 10^(3))=5A`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • KINETIC THEORY OF GASES ,THERMODYNAMICS AND RADIATION

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 9|30 Videos

  • MAGNETISM

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP|15 Videos

Similar Questions

Explore conceptually related problems

The magnetic induction at the center of a long solenoid, having 5000 turns per meter, is 3.142 xx 10^(-3) T. Find the current in the solenoid.

A long cylinder of iron having cross sectional area 6 cm^2 . It is kept inside a long solenoid having 4000 turns per metre. Current flowing in the solenoid is 1.5 A. Magnetic field developed inside the core is 3.14 T. Calculate pole strength developed in the core.

Knowledge Check

  • The magnetic field at a point on the axis of a long solenoid having 5 turns per cm length when a current of 0.8 A flows through it is

    A
    `5.024xx10^(-8) Wb//m^(2)`
    B
    `6.024xx10^(-8)Wb//m^(2)`
    C
    `7.024xx10^(-8) Wb//m^(2)`
    D
    `8.024xx10^(-8) Wb//m^(2)`

  • The strength of magnetic field inside a long current-carrying straight solenoid is:

    A
    more at the ends than at the centre
    B
    minimum in the middle
    C
    same at all points
    D
    found to increase from one end to the other

  • The magnetic field on the axis of a long solenoid having n turns per unit length and carrying a current is

    A
    `mu_(0)ni`
    B
    `mu_(0)n^(2)i`
    C
    `mu_(0)ni^(2)`
    D
    none of these

    • Similar Questions

    Explore conceptually related problems

    A long cylinder of iron having cross sectional area 6 cm^2 . It is kept inside a long solenoid having 4000 turns per metre. Current flowing in the solenoid is 1.5 A. Magnetic field developed inside the core is 3.14 T. Calculate pole strength developed in the core.

    The coercivity of a bar magnet is 120A//m . It is to be demagnetised by placing it inside a solenoid of length 120cm and number of turns 72. The current (in A) flowing through the solenoid is:

    The magnetic field B inside a long solenoid, carrying a current of 5.00 A, is (3.14 xx 10^-2) T. Find the number of turns per unit length of the solenoid.

    The strength of a magnetic field inside a long current-carrying straight solenoid coil is

    The magnetic field B within the solenoid having n turns per unit length and carrying a current I is given by

    Home
    Profile